Soft magnetic cobalt based amorphous alloys with low saturation induction

Nosenko, Anton; Kyrylchuk, Vasyl; Semen’ko, M. P.; Nowicki, Michał; Marusenkov, Andriy; Mika, Taras; Semyrga, Oleksandr M.; Zelinska, G.M.; Носенко, В. К.

doi:10.1016/j.jmmm.2020.167328

Cited by 22 publications

(12 citation statements)

References 38 publications

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“…Найпоширеніший захист від ЕМВ виконують зазвичай за допомогою спеціальних екранів на основі композиційних матеріалів [1]. Нанокристалічні металеві сплави дають змогу створювати нові композиційні матеріали з унікальними характеристиками [2][3][4][5].…”

Section: вступunclassified

Features of the Formation of Surface Layers on Metals

Hertsyk¹,

Kovbuz²,

Pandiak³

et al. 2022

Proc. Shevchenko Sci. Soc. Chem. Sci.

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The practical application of metal alloys, in particular amorphous ones, often necessitates the creation of multifunctional coatings of various nature and purpose on their surfaces. The main requirements for obtaining optimal results of applying such coatings are as follows: 1. Understanding of the morphology of the surface before coating. 2. Information on the physical and mechanical properties of the metal-coating composition. 3. Testing of the adhesion strength immediately after coating. 4. The use of different methods of control of the application and functionality of the coating, depending on the operating conditions of the product. The reliability of functional coatings also depends on the preparation of the surface of the material, as well as the choice of appropriate conditions for its formation. However, regardless of the purpose, a general requirement that all coatings must meet is a good adhesion to the surface of the substrate material. It is also important to ensure the uniform thickness in different areas (protrusions and depressions), because the thickness of the coating determines the longevity of its protective effect. Also, the coatings should have very low rate of dissolution even in the most aggressive environments in which they work. Therefore, the problem of creating optimal coatings is complex and requires a comprehensive study in each specific case. In the case of industrial use of amorphous metal alloys (AMA) based on transition metals with different alloying elements, special attention must be paid to the elemental composition of the surface of the finished products, which can differ significantly from the quantitative composition of the initial charge, which depends on the nature of the components and the applied protocol of ultra-fast cooling of the melt. The difference in the elemental composition on the surface and in the volume of the amorphous alloy is also due to the possible formation of surface chemical compound i.e. metal oxides. The protective properties are evaluated by the speed of metal oxidation, the formation of a layer and the duration of its action. Comparative assessment of the reactivity of amorphous alloys Al87.0Y5.0Ni8.0, Fe73.6Cu1.0Nb2.4Si15.8B1.2, Fe78.5Ni1.0Mo0.5Si6.0B14.0, Co75.5Fe4.6Si6,B16.7 in an aqueous solution of sodium chloride was carried out using electrochemical studies. The main requirements for obtaining optimal results of applying protective coatings on crystalline and amorphous surfaces have been analyzed.

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Section: вступunclassified

Features of the Formation of Surface Layers on Metals

Hertsyk¹,

Kovbuz²,

Pandiak³

et al. 2022

Proc. Shevchenko Sci. Soc. Chem. Sci.

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“…Therefore, the displacements of the magnetic domain boundaries cannot be taken into account as they are dumped by the eddy currents [7]. Therefore, the expression for the effective transverse magnetic permeability can be obtained using the procedure for minimizing the free energy functional, as described, for example, in [17]:…”

Section: Computer Simulationsmentioning

confidence: 99%

“…Latter, this kind of testing was used for characterization of the properties of different kind of stable suspensions [15]. Cobased amorphous ribbon is a well-known material with a very low negative value of the magnetostriction coefficient, low coercivity, high magnetic permeability [5][6][7][8][9][10], and also high temperature stability due to chromium additions [16,17]. One of the most interesting and well-understood features is the possibility of creation of the induced magnetic anisotropy of the desired type [7,18].…”

Section: Introductionmentioning

confidence: 99%

Magnetoimpedance of CoFeCrSiB Ribbon-Based Sensitive Element with FeNi Covering: Experiment and Modeling

Volchkov

Pasynkova

Derevyanko

et al. 2021

Sensors

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Soft magnetic materials are widely requested in electronic and biomedical applications. Co-based amorphous ribbons are materials which combine high value of the magnetoimpedance effect (MI), high sensitivity with respect to the applied magnetic field, good corrosion stability in aggressive environments, and reasonably low price. Functional properties of ribbon-based sensitive elements can be modified by deposition of additional magnetic and non-ferromagnetic layers with required conductivity. Such layers can play different roles. In the case of magnetic biosensors for magnetic label detection, they can provide the best conditions for self-assembling processes in biological experiments. In this work, magnetic properties and MI effect were studied for the cases of rapidly quenched Co67Fe3Cr3Si15B12 amorphous ribbons and magnetic Fe20Ni80/Co67Fe3Cr3Si15B12/Fe20Ni80 composites obtained by deposition of Fe20Ni80 1 μm thick films onto both sides of the ribbons by magnetron sputtering technique. Their comparative analysis was used for finite element computer simulations of MI responses with different types of magnetic and conductive coatings. The obtained results can be useful for the design of MI sensor development, including MI biosensors for magnetic label detection.

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“…The change of magnetic permeability is also significantly influenced by external magnetic fields, especially materials with very high magnetic permeability [ 35 ]. This, in turn, constitutes the base of giant magneto-impedance (GMI) effect [ 36 , 37 , 38 ].…”

Section: Introductionmentioning

confidence: 99%

Giant Stress-Impedance Effect in CoFeNiMoBSi Alloy in Variation of Applied Magnetic Field

Gazda

Nowicki

2021

Materials

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The article presents the stress impedance investigation of CoFeNiMoBSi alloy in variation of the applied magnetic field. In order to carry out the study, a specialized stand was developed that allows for loading the sample with stresses and simultaneous action of the DC (direct current) magnetizing field. The tests were carried out for as-cast and Joule annealed samples. The significant influence of the magnetizing field acting on the sample on the stress-impedance results was demonstrated and the dependence of the maximum impedance change in the stress-impedance effect was determined, depending on the field acting. The obtained results are important due to the potential use of the stress-impedance effect for the construction of stress sensors.

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Soft magnetic cobalt based amorphous alloys with low saturation induction

Cited by 22 publications

References 38 publications

Features of the Formation of Surface Layers on Metals

Features of the Formation of Surface Layers on Metals

Magnetoimpedance of CoFeCrSiB Ribbon-Based Sensitive Element with FeNi Covering: Experiment and Modeling

Giant Stress-Impedance Effect in CoFeNiMoBSi Alloy in Variation of Applied Magnetic Field

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